Image by https://www.thoughtco.com/
I. INTRODUCTION
A. Background
Language learner must acquire some formidable skills. Including the ability to produce and comprehend content of the sentences of the language, a sensitivity to the often very different cultural and pragmatic assumptions of speaker of the language, and the ability to recognize the ways in which propositional content of the target language is packaged grammatically to indicate the information functions of the various constituents.
English uses grammatical form to package information in such a way as to make clear information status as past or present information. Learners of English therefore need to be aware of the signal given by the grammatical form.